Quartering and pin turning apparatus



2 Sheets-Sheet l June 12, 1934. F. DUSTAN QUARTERING AND PIN TURNING APPARATUS Filed June 25, 1935 June 12, 1934. DUSTAN QUAHTERING AND PIN TURNING APPARATUS Filed June 23, 1935 2 Sheets-Sheet 2 g WQ INVENTUR Patented June 12, 1934 ?PA'TENT' OF F'iGE QUARTER'ING AND PIN TURNING APPARATUS Frank Dustan, Galt, Ontario, Ganada ApplicationJune 23, 1933, Serial No.6'77,285

7 Claims.

This invention relates to a'machine adapted for turning the crank pins of locomotive wheel sets or for boring theholes into which such pins are to be set.

Jill mn designing such a machine my principal objects were to provide a machine in which the wheel-'setswould be received in the position which the-wheels would assume under the influence of gravity, thatiswith both counterbalances below "10. the-axleand symmetrically disposed relative to a-vertical-passing through the axis of the axle. A further object is to sodesign the machine that the headstocks and other sliding parts move on other than vertical surfaces so that theinfiuence 1181 o-fgravity will keep them in' accurate contact with their supporting guides. Further objects will hereinafter appear.

1 I attain my objects by means'of a construction whichmaybe briefly described as follows: On a suitable bed are mounted two supports in which,

opposed" tail stocks are mounted. Beside each tail stock Support is mounted an angular cross guide, "its guiding surfaces incliningupwardly and outwardly at a'predeterminedangle to the vertical "plane in which lie the axes-of the tail stock centres; usually On each cross guide is mounted a head stock guide which is adjustable on the cross "guide transversely *of the machine.

Each headstock'guide has a head stock slidably mounted thereon on horizontal guideways extending longitudinally of the machine.

in each head 'stock is journalled a spindle adapted to carry the boring and turning tools. 1351 Owing 'to themethodof carrying the :head stocks the axesof the said spindles may be adjusted radially upward in diverging planes intersecting,

at an angle of 45, the vertical plane in which lie the axesof the tail stocks. The crank pins and 401 the holes in'which they are set are thus positionedabove the axle of the wheel set at an angular distance from one another of 90. Of coursegthe machine may beset forother angles'if desired.

The invention is hereinafter more specifically described and is illustrated in the accompanying'drawings in which *Fig. 1 is a fronteleva'tion of the machine;

Fig; 2 an end elevation looking from the right 501. in iii 'r Fig. 3.1a section on the .line 3--3 in Fig. 1 looking towards the left; and

L'Fig. =4 .aJside elevation of .one. ofithe cross guides .for !the headstock. guides.

'; in the drawings like numerals :of reference indicate corresponding parts in the different figures.

In the drawings details of the construction whichare old in the art andare not related to the present invention are omitted.

The bed'of the-machine is indicated by the reference numeral 1. On the bed are mounted in the usual manner the tail stocks 2, which carry the centres 3. These are operated in any known manner by the hand wheel 4 and are clamped by known clamping devices actuated by the lever arms 5.

The tail stock supports, it will-be noted,- are in reversed position at-opposite ends of the machine, their inner sides being substantially perpendicular to 'thebase and theinner sides of the bearings at their upper ends-bevelled, as indicated at -6, for a purpose which-will hereinafter appear.

Opposite the perpendicular side of each tail stock across guide 7 is secured to the'base. Each cross guide is formed with guiding and supporting surfaces 8 inclining upwardly andoutwardly at a-predetermined angleto the vertical plane in which lie the axes of the tail stockcentres, usually 45.

On each cross guide, a head stock guide 9 is adapted to slide. Eac'h head stockguide may be adjusted on thecrossguide bymeans of a screw 10 rotatably and non-slidably mounted on the crossguideand threaded through a nut 11 secured to the head stock guide.

Clamping bolts 12, passing through lugs on the head stock guide, have heads engaging in'T-slots 13 in the cross guide and serve to clamp the head stock guide as adjusted. i

As the head stock guide must be adjusted with the greatest possible accuracy to suit the crank throw of the wheel set and very rigidly supported as adjusted, I provide spacer blocks 14 which are adapted to be introduced between shoulders15 towardsopposite ends of the tail stock supports and shoulders 16 on the headstock supports. These shoulders have hard faced opposed surfaces thereon normal to the inclined surfaces of the cross guides. A suitable spacing block or blocks are inserted between the shoulders, the screws 10 are actuated to lower the parts into close contact and the clamping bolts 12 tightened up, when :the .head stock guides'will be found to bexas rigidlyand accurately positioned as if integral with the cross guides.

."The upper-surface ofyeach head stock guide is horizontaland is provided with guideways 17 on which the head stock 1 8 :is guided in a known manner. .As :the head stocks .thus slide on horiterbalances.

zontal surfaces, they are kept in intimate contact with their supports by gravity which helps to maintain accuracy of alinement and ensures ease of operation. Any known means may be used to move the head stocks longitudinally of the 1nachine.

In each head stock is journalled a tool carrying spindle 19. These spindles are positioned in the head stocks so that their axes lie in the diverging inclined planes, hereinbefore referred to, in which lie the axes of the tail stock centres. The spindles are thus above the axes of the tail stock centres and spaced each 45 from the vertical if that angle has been chosen for the inclination of the guideways of the cross guides.

The bevelling of the inner side of the upper end of each tail stock support, hereinbefore referred to, makes it possible to get the: axes of the spindles as close to the axes of the tail stocks as may be necessary. The splines are preferably hollow of the type shown in Vaughans United States Patent 1,093,219 of April 14, 1914 and may be equipped and driven in the same way. As nothing in the present invention turns on the precise arrangement of the spindles nor their drive and adjustment the details are neither shown nor described. Suffice it to say that the spindles are power driven in a known way from the motors 20 and that control of the drive and feed is by means of the hand wheels 21, 22 and lever arm 23.

A wheel set is shown in the drawings in dotted lines, 24 being the axle, 25 the wheels, 26 a hole for a crank pin, 27 a crank pin and 36 the coun- The wheel set is handled and positioned by means of shop cranes on the screw jacks 29, of known type, and between the tail stock centres 3 which are then set up.

As the machine is adapted to receive the wheels in the position they will take under the influence of gravity when suspended from a point midway between the crank pin holes and above the counterweights, the positioning is a simple matter.

Anchor clamps 30, of known type, hinged on the bed and provided with the opposed clamping screws 31 are then clamped to the wheel rims. The wheels are thus accurately positioned and securely held with the crank pin holes or crank pins accurately in line with the axes of the spindles, assuming, of course, that the head stock guides have been set for the proper throw.

If a crank pin hole is to be turned out a boring bar 32 is inserted in one of the hollow spindles 19. To handle these bars I provide the jib cranes 28 supported on the bed of the machine.

If a pin is to be turned cutting tools 33 are secured to two plates 34 bolted in T-slots 35 in the end of the hollow spindle 19.

It is evident that by using the appropriate tools two holes can be bored out at one time, two crank pins turned, or a hole bored in one wheel and a crank pin turned on the other.

While certain advantages of the present con struction have been hereinbefore referred to it is desirable to recapitulate and enlarge. The feature of utmost importance is that the wheel sets are handled in the position they naturally assume when free to turn on their axles. This greatly facilitates the handling and positioning of the sets since they may hang on their supports in stable condition whether the support is peripheral or axial. Also, as the wheel sets are held in the machine with their centre of gravity in the lowest possible position, an added degree of stability and rigidity is assured during the turning.

and boring operations. Further, the arrangement of the machine is such, as hereinbefore referred to, that the weight of the movable parts helps to secure and maintain an accuracy and rigidity of setting not heretofore attained in machines for this purpose. A yet further advantage is that the work is done at a position above the axis of the wheel set where all parts are readily accessible for either inspection or adjustment.

As abutments for the spacer blocks 14 are provided adjacent each end of the tail stock supports and head stock guides, absolute accuracy of alinement of the head stocks, and therefore of the spindles is attained as well as absolute accuracy of throw distance.

What I claim as my invention is:

1. In a quartering and crank pin turning ma chine for wheel sets, the combination of a bed; a pair of opposed tail stocks mounted on the bed; a pair of cross guides mounted on the bed adjacent the tail stock supports, one at one side of the support at one end of the machine and the other at the opposite side of the support at the other end, the guiding surfaces of the cross guides inclining upwardly and outwardly at a predetermined angle to the vertical plane in which lie the axes of the tail stock centres; a head stock guide adjustably mounted on each cross guide to move up and down its inclined guiding surfaces; horizontal longitudinal guides formed on each head stock guide; head stocks slidably mounted on said guides; and a tool carrying spindle journalled in each head stock, the axes of the spindles lying in inclined planes diverging upwardly from the axes of the tail stock centres parallel to the inclined guiding surfaces of the cross guides.

2. In a quartering and crank pin turning machine for wheel sets, the combination of a bed; a pair of opposed tail stocks mounted on the bed; a pair of cross guides mounted on the bed adjacent the tail stock supports, one at one side of the support at one end of the machine and the other at the opposite side of the support at the other end, the guiding surfaces of the cross guides inclining upwardly and outwardly a predetermined angle to the vertical plane in which lie the axes of the tail stock centres; a head stock guide adjustably mounted on each cross guide to move up and down its inclined guiding surfaces; shoulders on each head stock guide and the adjacent tail stock supports having opposed faces normal to the guiding surfaces of the adjacent cross guide; a spacer adapted to be fitted between said surfaces; horizontal longitudinal guides formed on each head stock guide; head stocks slidably mounted on said guides; and a tool carrying spindle journalled in each head stock, the axes of the spindles lying in inclined planes diverging upwardly from the axes of the tail stock centres parallel to the inclined guiding surfaces of the cross guides.

3. In a quartering and crank pin turning machine for wheel sets, the combination of a bed; a pair of opposed tail stocks mounted on the bed; a pair of cross guides mounted on the bed adjacent the tail stock supports, one at one side of the support at one end of the machine and the other at the opposite side of the support at the other end, the guiding surfaces of the cross guides inclining upwardly and outwardly at a predetermined angle to the vertical plane in which lie the axes of the tail stock centres; a head stock guide adjustably mounted on each cross guide to move up and down its inclined guiding surfaces; horizontal longitudinal guides formed on each head stock guide; head stocks slidably mounted on said guides; and a tool carrying spindle journalled in each head stock, the axes of the spindles lying in inclined planes diverging upwardly from the axes of the tail stock centres parallel to the inclined guiding surfaces of the cross guides, the upper end of each tail stock support being on a bevel to permit of the near approach of the head stock to the axis of the tail stock centre.

4. In a quartering and crank pin turning machine for wheel sets, the combination of a bed; opposed tail stocks carried thereon; opposed head stocks carried thereon; tool spindles carried by the head stocks parallel to the axes of the tail stocks; means for adjusting the head stocks to vary the position of the axes of the spindles in diverging planes extending upwardly from the axes of the tail stocks at equal angles to the vertical plane in which said axes lie; and means for slidably mounting the head stocks to move longitudinally of the machine.

5. In a quartering and crank pin turning machine for wheel sets, the combination of a bed; opposed tail stocks carried thereon; opposed head stocks carried thereon; tool spindles carried by the head stocks parallel to the axes of the tail stocks at equal angles to the vertical plane in which said axes lie; means for adjusting the head stocks to vary the position of the axes of the spindles in diverging planes extending upwardly from the axes of the tail stocks; and means for slidably mounting the head stocks to move longitudinally of the machine including horizontal guide surfaces and horizontal slide surfaces.

6. A machine according to claim 4 in which spacers are provided and shoulders on relatively movable parts of the machine between which the spacers are fitted to accurately position each head stock for length of stroke.

7. A machine according to claim 4 in which spacers are provided and shoulders spaced longitudinally on relatively movable parts of the machine between which the spacers are fitted to accurately position each head stock for length of stroke.

FRANK DUSTAN. 

